Yuu Park, a deadly martial arts expert, returns to Nereids. She has been serving time for causing injuries to more than 20 bystanders while trying to capture a petty thief. She is the close range combat specialist of the team and rumored to be as dangerous barehanded as Gloria is with her machineguns. Until her private investigator license is reissued, she is put under house arrest, and Maia is ordered to watch over her. . . But can Maia keep Yuu under control by herself?!